Dear Konrad as a Greek i have to help with this sigh.
It sais:
1. The quality of the water is controled.
2. You can get informations.
3. There are waste buskets.
4. There are a lifequard.
5. There are special points for access for people with special needs.
6. There are first aid facilities.
7. Camping is not allowed.
8. You have to swim before the floats.
9. The water in the baths is not drinkable.
10. No vehicles allowed.
11. No pets allowed in the beach.
I think that there are many thinds that allowed and any thing is not is for your own good.